Reciprocating pump for use in deep wells



Nov. 8, 1927.

' 1,648,620 K. ONISHI RECIPROCATING PUMP FOR USE IN DEEP WELLS Original Filed Nov. 10, 1925 2 Sheets-Sheet 1 Fri 2 4 .Ewen/azv v Nov. 8, 1927. 1,648,620

K. ONSHI RECIPROCATING PUMP FOR USE IN DEEP WELLS OriginaLFilGd Nov, 10, 1925 2 Sheets-Sheet 2 w co 0 Patented Nov.v 8, 1927.

UNITED STATES KASABURO ONISHI, OF TOKYO-EU, JAPAN.

BEGIPROCATING FUN]? FOR USE IN DEEP WELLS.

Application filed November 10, 1925, SeriaINo. 68,211.

The present invention relates principally to reciprocating pumps for use in deep wells, and is characterized by the construction in which an auxiliary pump barrel is caused to reciprocate within a main pump barrel in accordance with a connecting rod by means of a furcate guide rod operable by the connecting rod, the bottom end of the auxiliary pump barrel having a valve inside admitting to the auxiliary pump barrel and a piston outside with valves admitting to the main pump barrel, also a main piston with the piston rodpassing through the auxiliary pump barrel and connected to the connecting rod by means of obliquely crossed link work such that the motion of the main plston is opposite to that of the auxiliary barrel.

The main object of this invention is to effect continual delivery of water, which is obtained by means of the aforesaid construction in that the motion of the auxiliary pump barrel is opposite to that of the main piston, hence, during the down stroke of the main piston, the water in both the main and auxiliary pump barrels is forced up and out through the delivery pipe, and, during the up stroke of the mam plston, the' auxilia-ry pump barrel descends and fills with water whilst at the same time delivery is effected by the main piston. Thus delivery of the water is effected during both strokes of the main piston.

A preferred embodiment of the invention is illustrated in the accompanying drawin s, in which Fig. 1 is a partial sectional elevation of the pump,

Fig. 2 a side elevation of the pump,

Fig. 3 a sectional elevation of the bottom portions of main and auxiliary pump barrels showing the relative position of the parts during the upward motion of the conpiston,

Fig. 5 a similar elevation to Figs. 3 and 4, but showing the position of the parts when the motion of the connecting rod has changed from downward to upward,

Fig. 6 a'horizontal section on the line A-A of Fig. 3, and

Fig. 7 an elevation showing the working relationbetween the .connectlng rod, auxil- Renewed September 15, 1927.

ia'ry pump barrel, and the main piston rod.

Referring to the figures, a crank 1, which is rotated by the gears 2 and 3, imparts reciprocating motion to the furcated guide rods 6 and 6 by means of a connecting rod 4 and a transverseshaft 5, from which the furcated guide rods are suspended; the

guide rods are connected at their lower ends to the auxiliary pump barrel 7 which latter thus receives the same motion and slides in side the main pump barrel 9 whichis set Within the wall of the well 8. A fixed transconnected to the furcated guide rods 6, 6'

and the piston rod 24 of the main piston 16. As will be seen from the Figs. 1, 2 and 7,

the arrangement of the linkwork is such I that the motion of the. piston rod 24 is opposite to that of the guide rods 6, 6'.

The bottom end of the auxiliary pump barrel 7 is fitted with a lift valve 10 inside communicating to the auxiliary pump barrel and a piston 11 outside with butterfly valves 12 which communicate with the main pump barrel 9. The end of the-main pump barrel 9 forms the main piston chamber 15 which contains the main piston 16, this piston having water passages 22 and a sprlng lift valve 23, and fitted to the end of the piston chamber 15 is a strainer 18 and a spring lift valve 17. An additional barrel 20 is externally attached around the piston chamber 15, this barrel 20 has inlet ports 21 fitted with butterfly valves around its lower portion and a passage to the'piston chamber 15 and main pump barrel 9 is affected by means of inlet ports 19. The main piston rod 24 passes through piston 12 of the auxiliary pump barrel 7 and carries another piston 25 which slides within the, auxiliary pump barrel 7, this piston having water passages 26 and butterfly valves 27. The water is delivered from the main pump barrel 9 and from the auxiliary pump barrel 7 by means of a suitably placed port 13, into a delivery pipe 14.

The action of the pump is as follows As illustrated by Fig. 4, when the motion of the connecting rod changes from an up stroke to a down stroke, by the action of the furcate guide rods 6, 6' the auxiliary pump barrel 7 also commences a down stroke, thus opening" the lift valve and the butterfly valves 12, and allowing the water to pass through the lift valve 10 into the auxillary pump barrel 7 and also into the main pump barrel 9. At the same time the motion of the main piston rod 24 changes from a down stroke to an up stroke by the action of the links 28, 29, with the result that the spring lift valve 23 and the butterfly valves 27 are closed. This be ins the suction of water into the piston c amber and at the same time water is being forced up the main plin izp barrel 9 and the auxiliary pump barre When the motion of the connecting rod 4 changes from a down stroke to an up stroke,

as illustrated by Fig. 5, the motion of the auxiliary ump barrel? changes to an up stroke and the motion of the main piston rod 24 to a down stroke, the lift valve 10 and butterfly valves 12 being closed and butterfly valves 27 and spring valve 23 being opened. Thus water is forced through the main piston 16, the spring valve 17 being closed; also water is being sucked in the piston chamber 15 through the inlet ports 21 and 19, whilst the water in the main ump barrel 9 and auxiliary pump barrel (is being forced up by the pistons 11 and 25 and so out of delivery pi e as the motion of the auxiliary pump barre continues upward. The delivery at pipe 14 is thus practically continuous.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. Improvements in reciprocating pumps for use in deep wells, comprising a mam pump barrel and an auxiliary pump barrel, a connecting rod, means for reciprocating said rod, a furcate ide member connecting said rod to the auxi iary pump barrel whereby the latter is caused to reclprocate within the main pump barrel, an internal lift valve at the bottom of the auxiliary pump barrel, an external piston carried by said bottom, lift valves in said piston, a main piston below the auxiliary pump barrel, a piston rod attached to said piston and passin through the auxiliary pump barrel, and link-work connecting the piston rod to said connecting rod, whereby the motion of the main piston is opposite to that of the auxiliary barrel, substantially as described.

2. Improvements in reciprocating pumps for use in deep wells as set forth in claim 1, further characterized by another piston carried within the lower art of the auxiliary pump barrel by said plston rod, and valves provided in sald other piston, substantially as and for the purpose indicated.

3. Improvements in reciprocating pumps for use in deep wells according to claim 1, further characterized by an additional barrel provided around the main pum barrel, ports formed in said main barrel or establishing communication between the main barrel and additional barrel, and outlet and inlet valves in said parts, substantially as and for the purpose indicated.

In testimony whereof I have aflixed my signature.

KASABURO ONISHI. 

